nfsd: allow layout state to be admin-revoked.

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When there is layout state on a filesystem that is being "unlocked" that
is now revoked, which involves closing the nfsd_file and releasing the
vfs lease.

To avoid races, ->ls_file can now be accessed either:
 - under ->fi_lock for the state's sc_file or
 - under rcu_read_lock() if nfsd_file_get() is used.
To support this, ->fence_client and nfsd4_cb_layout_fail() now take a
second argument being the nfsd_file.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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This commit is contained in:

NeilBrown 2024-01-30 12:08:33 +11:00 • committed by Chuck Lever

parent 06efa66750

commit 1e33e1414b

4 changed files with 50 additions and 16 deletions

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4

fs/nfsd/blocklayout.c

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43

fs/nfsd/nfs4layouts.c

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11

fs/nfsd/nfs4state.c

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8

fs/nfsd/pnfs.h

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